[ips-si-alert] WEAK SUDDEN IMPULSE DETECTED (11nT) IN MAGNETOMETER DATA 04 10 25 1136UT issued 1152 UT on 04 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

WEAK SUDDEN IMPULSE DETECTED (11nT) IN MAGNETOMETER DATA 04 10 25 1136UT
               Mean Magnetometer Parameters Pre/Post Impulse:
                                     Pre        Post       Pre/Post
Magnetometer Station          Unit   Impulse    Impulse    Change
Cocos_Island_(GA/BOM/ETH)      nT    193.9      198.1        4.2
Darwin_(GA)                    nT    113.5      124.2       10.7
Darwin                         nT     10.3       21.3       10.9
Townsville_(GA)                nT   -655.4     -643.8       11.5
Townsville                     nT   -913.7     -902.1       11.6
Townsville_(ICSWSE/BOM)        nT    205.6      217.0       11.4
Learmonth_(SWS)                nT   -988.0     -971.6       16.4
Canberra_(GA)                  nT   -186.6     -175.3       11.3
Hobart                         nT   -441.2     -423.7       17.5

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au